No neither the leader or deluxe version have a removable Matrix. The deluxe version does have a sculpted one though. Maybe you are thinking of Cybertron Prime?

http://www.tfw2005.com/transformers...us+Prime/029_powerlinx_optimus_prime.jpg.html No, just one molded in the chest for looks.

No, the Leader Armada Prime had a sculpted matrix in his chest fold but that was it. Like the guy ahead of me said Cybertron/Galaxy Force Optimus Prime did have a removable matrix.

Energon Prime didn't have a matrix as they were trying to keep in continuity with Armada, where at the end he discarded the Matrix as he took on the role of Leader of all Transformers.

It's not an actual matrix, just a matrix-like design. In the show and other fiction he had no Matrix.